Finnair Plus - Why is AY831 leaving late

Note that the 8.00 HEL-LHR has been over an hour late leaving Vantaa for the last couple of days. Does anyone know why?oes anyone know why?:confused:

It is apparently the congested destination where the permits to start the engines even at HEL for planes bound to LHR are granted. At least that explanation is often given when departing late. Did the same occur to BA795 supposed to leave some 15 min earlier?

No the BA flight has been on time. AY 831 was on time today